摘要
以剑麻纤维废弃物为原料,磷酸法活化制备了高吸附性能活性炭,考察了磷酸质量分数、磷酸与原料浸渍比、活化温度和活化时间4个因素对活性炭吸附性能的影响。采用比表面积及孔隙度分析仪、热重分析仪(TG)和扫描电子显微镜(SEM)对活性炭样品进行表征。结果表明,影响活性炭吸附性能的因素按重要性排序,依次是活化温度>活化时间>磷酸质量分数>浸渍比。最佳制备工艺为:磷酸质量分数50%,磷酸与原料质量浸渍比1.5∶1,活化温度400℃和活化时间70 min,该条件下制备的活性炭BET比表面积达1 877 m2/g,总孔容积1.87 cm3/g,平均孔径4.0 nm,亚甲基蓝吸附值(QMB)225 mg/g,碘吸附值(QI2)1 051.1 mg/g,得率35%。
High absorption performance activated carbons were prepared from sisal fiber waste by phosphoric acid activation. The inference of mass fraction （to （H3PO4 ） ）, impregnation ratio, activation temperature and heating time on adsorption properties of activated carbons were investigated. The obtained activated carbons were characterized by Nitrogen adsorption-desorption iso- therms, thermo-gravimetry （TG） and scanning electron microscope （SEM）. It was found that the order of factors that influence adsorption properties was： activation temperature 〉 activation duration time 〉 to（ [-I3PO4 ） 〉 impregnation ratio. The optimal pre- treatment and activation conditions are： to（ H3PO4 ） 50 %, impregnation ratio 1.5：1, activation temperature 400 ℃ and heating time 70rain. The yield of the activated carbon is 35 % with the properties of the sample is as follow： specific surface area （ SBET ） 1 877 m2/g, total pore volume 1.87 em3/g, average pore diameter 4.0 rim, iodine number （ QIa ） 1 051.1 mg/g, amount of methylene blue adsorption （QMB） 225 mg/g.
出处
《林产化学与工业》
EI
CAS
CSCD
北大核心
2013年第3期105-109,共5页
Chemistry and Industry of Forest Products
基金
国家林业局林业公益性行业专项(201004051)
'十二五'农村领域国家科技计划项目(2012BAD30B0204)
关键词
活性炭
磷酸活化法
剑麻纤维
中孔发达
activated carbon
phosphoric acid activation
sisal fiber
well-developed mesopores
